STRUCTURAL BEHAVIOR OF REINFORCED HYBRID CONCRETE COLUMNS UNDER BIAXIAL LOADING

ALAA HUSSEIN   AL-ZUHAIRI; ALI HUSSEIN ALI  AL-AHMED; AMMAR HANOON; ALI ABDULHAMEED

doi:10.1590/1679-78256640

STRUCTURAL BEHAVIOR OF REINFORCED HYBRID CONCRETE COLUMNS UNDER BIAXIAL LOADING

Authors

ALAA HUSSEIN AL-ZUHAIRI CIVIL ENGINEERING DEPARTMENT, COLLEGE OF ENGINEERING, UNIVERSITY OF BAGHDAD, BAGHDAD 10071, IRAQ HTTPS://ORCID.ORG/0000-0003-3859-6949
ALI HUSSEIN ALI AL-AHMED CIVIL ENGINEERING DEPARTMENT, COLLEGE OF ENGINEERING, UNIVERSITY OF BAGHDAD, BAGHDAD 10071, IRAQ HTTPS://ORCID.ORG/0000-0003-3409-7237
AMMAR HANOON DEPARTMENT OF RECONSTRUCTION AND PROJECTS, UNIVERSITY OF BAGHDAD, BAGHDAD 10071, IRAQ HTTPS://ORCID.ORG/0000-0002-1369-9856
ALI ABDULHAMEED DEPARTMENT OF RECONSTRUCTION AND PROJECTS, UNIVERSITY OF BAGHDAD, BAGHDAD 10071, IRAQ HTTPS://ORCID.ORG/0000-0002-6845-3669

DOI:

https://doi.org/10.1590/1679-78256640

Abstract

THE STUDY AIMS TO INVESTIGATE THE BEHAVIOUR OF REINFORCED HYBRID CONCRETE COLUMNS CONSISTED OF TWO FULLYBONDED CONCRETES SUBJECTED TO BIAXIAL LOADING. EXPERIMENTAL TESTS WERE CONDUCTED ON 5 SQUARE COLUMNS OF 200MM SIDE DIMENSIONS. TWO COLUMNS WERE CAST FROM ONE TYPE OF CONCRETE BUT WITH VARIED STRENGTH. THE OTHER THREE SPECIMENS WERE CAST BY HYBRID CONCRETE WITH DIFFERENT HYBRID’S RATIOS. THE STUDY ALSO COMPRISED THE DERIVATION OF AN ANALYTICAL MODEL, SIMULATING THE BEHAVIOUR OF THE TESTED COLUMN BY NUMERICAL MODELS, AND STATISTICAL EVALUATION. WHEREAS A COMPUTER PROGRAM WAS CONSTRUCTED TO EVALUATE THE ULTIMATE STRENGTH OF HYBRID COLUMNS AND FINITE ELEMENT MODELS WERE EXECUTED FOR THE NUMERICAL ANALYSIS. BOTH RESULTS WERE COMPARED WITH THE EXPERIMENTAL OUTCOMES AND GOOD AGREEMENT WAS OBSERVED. THE RESULTS REVEALED AN INCREASE IN THE ULTIMATE LOAD OF HYBRID COLUMNS BY 33.5% AS COMPARED WITH CONVENTIONAL COLUMNS. ALSO, THE ULTIMATE LOAD INCREASED BY 38% WITH DECREASING THE HYBRID’S RATIO TO 0.16. IT WAS CONCLUDED THAT HYBRID COLUMNS WITH SMALL HYBRID’S RATIOS SUSTAIN HIGHER LOADS, MOMENTS AND EXHIBITED FEWER AXIAL STRAINS.

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Published

2021-07-14

Issue

Vol. 18 No. 6 (2021)

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Articles

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